rockbrain
Cave Dweller
Member since January 2022
Posts: 3,035
|
Post by rockbrain on Jan 8, 2022 15:00:23 GMT -5
Can anybody tell me what kind of geode / thunder egg / nodule this is. I thought it looked like coral but of course it's not. I don't have any idea where it was originally collected. I got it from a collection that was being liquidated. I never met the collector.
|
|
|
Post by rockjunquie on Jan 8, 2022 15:13:27 GMT -5
Oh my! That begs to be cut open!
|
|
rockbrain
Cave Dweller
Member since January 2022
Posts: 3,035
|
Post by rockbrain on Jan 8, 2022 17:21:57 GMT -5
I've got a few other pieces. So far the insides are completely white with a hollow full of very small white crystals.
|
|
|
Post by RickB on Jan 8, 2022 23:00:26 GMT -5
|
|
Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,487
|
Post by Sabre52 on Jan 9, 2022 15:35:20 GMT -5
Yep, some keokuk geodes are like that too. I've also heard those are geodes after fossil crinoid heads.
|
|
rockbrain
Cave Dweller
Member since January 2022
Posts: 3,035
|
Post by rockbrain on Jan 9, 2022 20:27:42 GMT -5
That's pretty cool! Thanks so much for the ID! I'll post when I cut it open.
|
|
|
Post by rmf on Jan 15, 2022 5:05:42 GMT -5
rockbrain That Geode is typical of ocean bottom formation Geodes found in Tennessee, Kentucky, Indiana and the Keokuk Iowa/Missouri area. They are formed when a fossil like a crinoid caylx, coral, blastoid, Brachiopod break up and are replaced/filled with silica. I have a scientific paper around here somewhere, I purchased on the subject, but have since misplaced.
|
|